A projectile that is fired vertically at 5 km/s from the Earth's surface will
A) go into a circular orbit about Earth.
B) go into an elliptical orbit about Earth.
C) rise and fall back to Earth's surface.
D) none of the above
Answer: C
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a. True b. False Indicate whether the statement is true or false
What types of observations are necessary to determine the motion of a star through space?
What will be an ideal response?
During each cycle of its operation, a certain gasoline engine consumes 500 joules of chemical energy, while exhausting 300 joules of thermal energy to the environment. The energy efficiency of this heat engine is
A) 60%. B) 40%. C) 67%. D) 20%. E) None of the above.
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase,
and a fringe pattern is observed on a screen 4.8 m from the slits. If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light? A) 550 nm B) 600 nm C) 650 nm D) 700 nm E) 750 nm